FREMONT -- Monday morning commuters won't be impacted by the Saturday night Amtrak derailment that delayed travelers by about four hours, a spokeswoman said Sunday.

Four trains didn't make scheduled stops in Hayward and Fremont Sunday morning due to repairs after the derailment Saturday around 9 p.m. two miles north of Fremont, but that was the end of the disruptions, said Christina Leeds, an Amtrak spokeswoman. The cause of the derailment remains under investigation, she said.

The derailment happened Saturday night when the front two wheels on the lead locomotive of the Seattle, Wash.-bound train came off the track. None of the 164 passengers or 14 crew members who had set out from Los Angeles were hurt, said Leeds. The train pulled into Oakland around 1:45 a.m.